And get rid of the Name "main::whatever" used only once ... warnings with a use vars qw($a $b); (or similar) statement.
>perl -wMstrict -le
"use 5.010;
use List::MoreUtils qw(pairwise);
my @arr1 = (1, 2, 3);
my @arr2 = (10, 20, 30);
use vars qw($a $b);
my %hash = pairwise { ($a, $b) } @arr1, @arr2;
use Data::Dumper;
say Dumper(\%hash);
"
$VAR1 = {
'1' => 10,
'3' => 30,
'2' => 20
};
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